Was in the progress of creating this >> 
 #include <ButtonConstants.au3>
#include <Constants.au3>
#include <WinAPI.au3>
Example()
Func Example()
	Local $hGUI = GUICreate('')
	Local $iLabel = GUICtrlCreateButton('', 0, 0, 50, 50)
	Local $iCheckbox = GUICtrlCreateCheckbox('', 0, 0, 100, 20) ; This is considered a 'Button' by _WinAPI_GetClassName too.
	GUISetState(@SW_SHOW, $hGUI)
	MsgBox(4096, '', 'AutoIt Button ID: ' & _IsButton($iLabel) & @CRLF & _
			'AutoIt Button Handle: ' & _IsButton(GUICtrlGetHandle($iLabel)) & @CRLF & _
			'AutoIt Checkbox ID: ' & _IsButton($iCheckbox) & @CRLF & _
			'AutoIt Checkbox Handle: ' & _IsButton(GUICtrlGetHandle($iCheckbox)) & @CRLF)
	Return GUIDelete($hGUI)
EndFunc   ;==>Example
; Check if a variable is referencing a Button control.
Func _IsButton($hWnd)
	If IsHWnd($hWnd) = 0 Then
		$hWnd = GUICtrlGetHandle($hWnd)
	EndIf
	Local $sClassName = _WinAPI_GetClassName($hWnd)
	If $sClassName = 'Button' Then
		Local $aStyle[5] = [4, $BS_CHECKBOX, $BS_AUTOCHECKBOX, $BS_RADIOBUTTON, $BS_AUTORADIOBUTTON]
		Local $iLong = _WinAPI_GetWindowLong($hWnd, $GWL_STYLE)
		For $i = 1 To $aStyle[0]
			If BitAND($iLong, $aStyle[$i]) = $aStyle[$i] Then
				Return False
			EndIf
		Next
		Return True
	EndIf
	Return False
EndFunc   ;==>_IsButton